PARIS/MONTREAL, Sept 6 (Reuters) - Further delays in
deliveries of the latest jet engine from Pratt & Whitney
underline the challenges of speeding up manufacturing for
multiple planemakers as well as pressure on an already taut
supply chain, industry sources said.

Canada's Bombardier said it was cutting forecasts
for CSeries jet deliveries because of delays in getting engines
from Pratt & Whitney, one of a handful of engine makers whose
efficient new designs have triggered a boom in aircraft sales.

Pratt & Whitney did not say what had caused the delays, but
suggested it was grappling with problems at its own suppliers.

"In terms of production, we've made significant headway in
the supply chain, but there is some pressure on new engine
deliveries for this year," a spokeswoman said in a statement.

Three industry sources said the U.S. engine maker also faces
challenges in bedding down the manufacturing techniques for the
engines' novel "hybrid-metallic" fan blades, the world's first
to be made mainly from aluminium alloy.
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